Stoker.



T. V. ELLIOTT.

STOKER. APPLICATION FILED DEC. 8, 1904. RENEWED MAR. 13, 1908.

Patgnted Nov. 3, 1908.

' a SHEETS-SHEET 1 nwmrok WITNESSES:

- maddz'ow ZZZZLIOZQY ATTORNEYS T. V. ELLIOTT.

STOKER. APPLICATION FILED DEC. 8, 1904. RENEWED MAR. 13, 1908.

903 131. Patented NOV.3,1908. s SHEETS-SHEET z.

ATTORNEYS T. V. ELLIOTT.

. STOKER. I APPLIOATION-IILBD DEO.8, 1904. RENEWED MAR. 13, 1908. I903,181. Patented Nov. 3, 1908;

3 SHEETS-SHEET 3.

' ATTORNEYS THADDIOUS V. ELLIOTT, OF NEW YORK, N. Y., ASSIGNOR TO MARIEAELLIOTT, F FLAT BUSH, NEW YORK.

'sronnn.

Specification of Letters Patent.

Patented Nov. 3, ices.

Application filed December 8, 190e, Serial n5. 235,942. Renewed March13, 1908. Serial No. 420,802.

To all whom it may concern.

Be it known that I, THADDIOUS V. ELLIOTT, a citizen of the UnitedStates,residing in the city of New York, Flatbush, borough of Brooklyn, in thecounty of Kings and State of New York, have invented a new and 1mprovedStoker, of which the following is a full, clear, and exact description.

The object of the invention-is to provide a new and improved stoker forautomatically feeding coal and like fuel to a furnace, to anspondingparts in all the views.

Figure 1 is a longitudinal sectional elevation of a boiler furnaceprovided With the improvement, the section being on the line 1-1 of Fig.2; Fig. 2 is a front elevation of the same; Fig. 3 is a transversesection of the same, on the line 3 3 of Fig. 1; Fig. 4: is an enlargedsectional plan view of the improvement, the section. being on. the line4-4 of Fig; 5; Fig. 5 is a sectional side elevation of the same, on theline 5-5 of Fig. 4; Fig. 6 is a similar View of the same, on the line6-6 of Fig. 4; Fig. 7 is alike view of the same, on the line 77 of Fig.4 Fig. 8 is an enlarged plan View of a portion of the grate, Fig. 9 is atransverse section of the same and part of the means for shaking thegrate bars; and Fig. 10 is an enlarged transverse section of part of themechanism for shaking the grate bars.

The furnace A on Which the improved formed in the bottom of the tubularmember E, the said openings leading into the casings D and D, so thatthecoal is engaged by revolving brushes 0 and C and orced by the latterthrough openings A. formed in the front A into the firebox and onto thetopof the grate sections B and B for the fuel to be burned on the saidgrate sections.

in order to control the amount of fuel passing through the sets ofopenings E and E", suitable cut-off slides G are provided,

mounted on the under side of the bottom of the tubular member E,provided With handles G, adapted. to be taken hold of by the operator tomove the cut-off slides G transversely, to 0 en the openings E and Emore or less, to al ow more or less coal to fall from the tubular memberE into the casings D and D. The handles G can be reached by the operatorinserting the hand through openings D formed in the casings D and D andnormally closed by suitable hinged doors D", as plainly indicated inFigs. 1, 2, 5, 6 and 7. The shaft E of the wheel E? is provided with agear wheel H, in mesh with a gear Wheel H secured on a verticallydisposed shaft H journaled in suitable bearings and carrying a wormwheel'H in mesh with a Worm li fastened on the main shaft 1,extendingtransversely on the front A of the boiler furnace, the saidshaft being provided i With a pulley I, connected by a belt with stokeris applied is provided in its firebox i with a grate B, made V-shaped incross sec-v tion, to provide inclined sides or sections B f v i tion tothe WOIlIl Wheel H shaft H and and. B onto which the fuel, such as coalin a divided state, is scattered by the force of rcvolving brushes C andC arranged 1n casings D, D held on the outside of the front A of I thefurnace, the fuel being fed to the sail casother machinery for impartingrotary n otionto the said shaft I. When this shaft I is rotated, theworm H imparts a rotary mo- Wheel E to rotate,- so that a continuoustraveling motion is given to the endless ings D and D and thebrushes Cand C by a 1 cable or chain it, to cause the disks E to delivery deviceE, receiving the coal from a 1 push the coal to the openings E and It)",

hopper F, the aid delivery device E being through which the fuel dropsinto the casings l) and D, to be brushed by the brushes C and Qthroughthe openings A. onto the grate sections B and B The brushes and Caresecured on the shaft 1, which is rotated at a comparatively high rateof speed, so that the rotation of the brushes; is

formed or secure at the ends of each of the grate bars 13, preferably ofthe shape shown in Fi 8 and ada )ted to rock, so as to agitate theburning'uel on the grate bars and to cause the same to gradually slipdownthe grate bars toward the a ex of the grate, the burned-out materialbeing finally removed from the apex of the grate by the use of dumpingbars B", hereinafter more fully describe 1 Each ofthe grate bars B isprovided with openings for the ready passage of the air, so

as to insure complete combustion of the fuelon the said grate bars.-Eachroi the grate bars B is provided With a dependim arm 13, carrying apinjB and the sever-alpine of one grate section: B. or B engage notchesJ cutQIin a bar J, piv'otally connected byalinkd With'an arm J attachedto a longitudinally extending shaft J journaled in suitable bearin s onthe corresponding frame B (see Fig. 9 The outer end of the shaft-J4extends through the'front A of the furnace and on the outer end of thesaid shaft issecured an arm J (see Fig. 2), con nected with theeccentric rod J" of an eccentrio J mounted to rotate loosely on a shaftK, carrying the corresponding dumping bar B above referred to.

The disk of each eccentric J is secured or formed on a worm wheel L (seeFigs. 2 and 5), in mesh with a worm L", secured one vertically disposedshaft N, provided at its upper end with a gear Wheel N, in mesh with aninternal gear wheel Q, formed on a wheel 0, havin its peripheral faceprovided with a Worm w eel O in mesh with a Worm 0 secured on the mainshaft 1. i l/hen the latter is rotated, the Worm O imiarts arotarymotion to the worm Wheel 2 and the wheel 0, so that the internalgear wheel 0 thereof imparts a rotary motion to the gear wheel N andconsequently to the shaitN, r which 111 turn rotates by its worm wheel Lthe worm Wheels L, meshing with the worm wheel on opposite sidesthereof. The. worm wheels L, on account of being secured to thecorresponding disks of the eccentrics J, cause the eccentric rods J toimpart a swinging motion to the arms J, to rock the shafted, whereby thearms J ,'l inls 5 bars J, pins'B and arms B impart-a rocking motion tothe grate bars B to agitate the burning fuel thereon and cause the sameto rate sections ismounted on a frame B 118N111 bearings for trunnions15* are B at the apex portion of the grate sections B and B of the rateB.

In order to periodica lly turn the dumping barsld of the grate sectionsB and. E the following device-isprovided: Normally the bars B are heldin a closed positi.on,-as shown in. Fig. 3, by the action of a Wei ht Khung on an arm K de ending from t e shaft K of a dumping bar 0n theshaft K is secured an. upwardly extending arm K, on which is fulcrulnedalink K rovided on its free end with a projecting in adapted to beengftged by a similar lug i on. a sprocket chain. 7

sponding eccentric J ,.so as to rotate with the said eccentric disk, thesaid. sprocket chain If also passing over idler sprocket wheels K,mounted to rotate loosely on the shafts J. When the stoker is in action,a rotary motion is given to the worm wheel L, the disk of the eccentricJ and the sprocket .Wheel K and then the latter imparts a trav passingover a sprocket wheel K fastened to the hub of the disk. for the coneradually work downward to the dumping As the arm K assumes anangular'position, it

is evident that the lu K gradually moves out of engagement wit the lug Kand consequently the shaft K is rocked back to its normal osition by theaction of the weight 15., so t. at the dumping bar BF moves back into aclosed position after the clinhers or spent material is dumped. Theashes falling from the rocking grate bars B down into the ash pitfinally reach the inclined bottoms P and P ofthesaid ash pit, and theashes are scraped down the inclined bottoms by scrapers Q onto aconveyor it of spiral shape, mountedto turn in the corresponding'casmg Pinto which lead the lower ends of the bottoms l and it.

The scrapers Q are in the form of longitudinal bars secured to sprocketchains Q passing over sprocket wheels Q and Q, (see Fig 3), the sprocketWheels Q being socured on longitudinally extendingshafts (2,, each ofwhich passes with its outer" end through the furnace front A .to-theoutside thereof, and on the outer-end of this shaft tf is secured a Wormwheel in mesh with a Worm Q" secured on the shaft driven from the shaftI by the gearing above described. Thus, when the shaft'h is rotated, theshafts Q driven and consequently thesprochet chains Q, to cause thescrapers Q to scrape the ashes down the inclined bottoms l? and 1? intothe casing P and onto t he spiral conveycr it, which conveys the ashesout of the furnace at one end thereof. The chnhcrs see, 1 er.

and other spent material dumped by the dumping bars B also fall onto theconveyor the lower end of the shaft N, so that when the latter isrotated, a rotary motion is given to the conveyer R, for carrying theashes and cinders out of the furnace at one end thereof. From theforegoing it will be seen that when the shaft I is rotatedat a hi "11rate of speed, then the brushes C and are revolved at the samespeed, toforcibly scatter the coal onto the grate bars B of the grate sections Band B and at the same time a traveling motion is given to the endless cable or chain E", so that the disks E7 continually feed coal to the said.brushes by way of the openings E and E. i 1

By connecting the main shaft I with the vertical shaft N in. the mannerdescribed, a slow motion is given to the said shaft N, which in turnactuates the rocking grate bars B so that the fuel is continuallyagitated, to insure a uniform and, complete combustion of the fuel. Theshaft N also drives the scrapers Q, to cause the ashes .to be carried tothe conveyor R, and the dumping .bars B are periodically actuated, todump the spent material onto the conveyer, for the latter to carry thespent material off together with the ashes, as previously explained.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l'. A stoker comprising the following instrumentalities in combination,viz: afuel sup ply, a fuel conveyer for conveying the fuel "from thesaid supply and delivering it to a lace of discharge, a delivery devicefor movmg the fuel from the said place of discharge onto the grate, agrate having movable grate bars, an ash remover, and. means forsimultaneously actuating the fuel conveyor, the de-= livery device, thegrate bars, and the ash remover.

2. A stoker, comprising a hopper, a fuel conveyor for removing the fuelfrom the hopper and delivering it to a place of discharge, a deliverydevice for delivering the fuel onto the grate, a grate having movablegrate bars, an ash remover under the grate bars, an ash conveyor forcarrying off the ashes delivered thereto by the ash remover, and meansfor simultamously actuating the fuel conveyer, the delivery device, thegrate bars, the ash. remover and the ash conveyer.

3. ll stoker comprising the following instrumentalities in combination,namely: a hopper, an endless fuel conveyer for removing the fuel fromthe hopper, revolving brushes for brushing the fuel received from theconveyer onto the grate, a grate having movable grate bars, anash-remover under the grate bars, an ash-conveyer for carrying off theashes and into which delivers'the'said ashremover, and means forsimultaneously actuating the said fuel conveyer, the said brushes, thesaid grate bars, the said ash-remover and the said ash-conveyer.

i. In a Stoker, the combination with a furnace, and its grate, of brushcasingsi on the front of the furnace and opening into the same, one ateachside of the longitudinal center of the grate, a revolving brush ineach casing for feeding fuel onto the grate, a casing above the brushcasings and having tubular members, one of which is provided with valvedo enings in its bottom opening into the brusfi casings, and an endlessfuel conveyor in the tubular members of the said casing for deliveringfuel to the brushes.

5. In a stoker, the combination with a furnace and its grate, of a brushcasing on the front of the furnace and opening into the.

same, a brush in the casing for feeding fuel onto the grate, a conveyercasing extending horizontally along the front of the furnace above thebrush. casing and having tubular members, one of which communicatesthrough an opening in its bottom with the brush casing, anv endlessconveyor in the conveyor casing and traveling through the tubular members thereof, and means for operating the conveyor from the brushoperating means.

6. In a Stoker, the combination with a furnace and a grate, of brushcasings on the front of the furnaceand opening into the same, one ateach side of the center of the grate, a revolving brush in each casingfor feeding the fuel onto the sides of the grate, the brushes beingmounted on a common shaft, a casing'having openings leading into thebrush casings, a fuel conveyer in the said casing, and means foroperating the conveyer from the shaft of the brushes.

7. In a Stoker, the combination with. a furnace, of brush casings on theoutside of the furnace and opening into the same, a revolving brush ineach casing, the brushes being on a common shaft, a casing above thebrush casings and having tubular members in the bottom of one of whichare openings leading to the brush casings, an endless fuel conveyer in.the tubular nie jibers of the casing, a hopper having chutes openinginto the tubular members of the. said casing, and means for. operatingthe conveyor from the shaft of the brushes.

8. In a stoker, the combination with a furnace, of brush casings on theoutside of the furnace and opening into the same, a revolving brush ineach casing, a casing above the brush casings and opening into the saidbrush casings, an endless oonveyer in the casing above the brush casingsfor feeding the fuel to the brush casings, means for operbelow thegrete, e eonveycr for removing the ashes delivered thereto by thescrapers, and means for simultaneously cperating the rocking members ofthe grate, the brush,the fuel conveyer and the ash scrapers andconveyer. 1 {p 10. In it stoker, the combination with e; furnace, of arevolving brush for feeding fuel into the furnace, e feed device forfeeding fuel to the brush, means for operating the feed device from thebrush shaft, e gretehaving rocking grete'bers and dumping hers, meansfor operating the grate bars from-the brush shaft, and, means foroperating the dumping hers from the grate be]? operating means. 11,111 aStoker, the combination with a furnace, of 'a revolving brush forfeeding" the fu el into the furnace, e feed device for feeding fuel tothe brush, means for operating the feed device from the crush shaft, egrate having rocking grate hers and dumping hers, means for operatingthe grate bars fronn'the brush shaft, end'meens for periodicallyoperating the dumping bars from the grate bar operating means.

-12. In a Stoker, the-combination with a furnace, of arevolving brushfor feeding fuel to the furnace, a feed device for feeding fuel to thebrush, "meens ior 'eneieting the'feed device froin the hrash-shaft, e'grete having rocking rate bars and durn ing bars, a erticel shet,..gearing-hetween he e per end of the shaft end the brush shaft, mecenism. between the vertical shaft and the grate here for rocking thesame, and mechanism for periodically -ope rating the dum ing bars fromthe grate bar operating mec anism.

. 13. In aigr ate the combination with a furuses, of a revolving brushfor-feeding fuel to the furnace, n'feeddevice for feeding fuel to Ythebinshjmeens for ogerating the feed de- Vice from the brush s aft, agrate having rocking grate bars and dumping bars, a ver- :tic'el sheft,gearing between the upper end of the said shaft end the brush shaft,mechanism between theverticel shaft end the grate- 'bers-forzrqcking thegrate bars, mechanism for eriodicall operating the dumping bars from thegrate bar operating means, an ash remover below the grate, means foropera't ing'the'esh;1'em0'ver from the vertical shaft, an ashconv'eyer,and means for onerating the said conveyer from the vertical shaft.

In testimony whereof I have signed my nameto this specification in thepresence of two subscribing witnesses. I

I THADDIQUS V. ELLIOTT,

- Witnesses;

Tnno. G. 'HosTEn, EVERARD BOLTON MARSHALL.

